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NVD / CVE Program· CNA Linux

CVE-2023-53551: usb: gadget: u_serial: Add null pointer check in gserial_resume

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3b24c980dc07be4550a9d1450ed7057f882530e5, 44e004f757a7ae13dfebaadbcfdb1a6f98c10377, 5ec63fdbca604568890c577753c6f66c5b3ef0b5.

Low priority for now. Upgrade to Linux Linux 3b24c980dc07be4550a9d1450ed7057f882530e5, 44e004f757a7ae13dfebaadbcfdb1a6f98c10377, 5ec63fdbca604568890c577753c6f66c5b3ef0b5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Add null pointer check in gserial_resume Consider a case where gserial_disconnect has already cleared gser->ioport. And if a wakeup interrupt triggers afterwards, gserial_resume gets called, which will lead to accessing of gser->ioport and thus causing null pointer dereference.Add a null pointer check to prevent this. Added a static spinlock to prevent gser->ioport from becoming null after the newly added check.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 4, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.8 and later · before 5.10.171
  • linux linux kernel5.11 and later · before 5.15.97
  • linux linux kernel5.16 and later · before 6.1.15
  • linux linux kernel6.2 and later · before 6.2.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.8affected
    • aba3a8d01d623a5efef48ab8e78752d58d4c90c3 and later · before c5360eec648bd506afa304ae4a71f82e13d41897affected · git
    • aba3a8d01d623a5efef48ab8e78752d58d4c90c3 and later · before 3b24c980dc07be4550a9d1450ed7057f882530e5affected · git
    • aba3a8d01d623a5efef48ab8e78752d58d4c90c3 and later · before ec357cd3e8af614855d286dd378725cdc7264df6affected · git
    • aba3a8d01d623a5efef48ab8e78752d58d4c90c3 and later · before 44e004f757a7ae13dfebaadbcfdb1a6f98c10377affected · git
    • aba3a8d01d623a5efef48ab8e78752d58d4c90c3 and later · before 5ec63fdbca604568890c577753c6f66c5b3ef0b5affected · git
    • before 5.8not affected · semver
    • 5.10.171 and later · up to and including 5.10.*not affected · semver
    • 5.15.97 and later · up to and including 5.15.*not affected · semver
    • 6.1.15 and later · up to and including 6.1.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.15-16.1.15-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-53547Oct 4, 2025 · drm/amdgpu: Fix sdma v4 sw fini error
    22Monitor
  • ← EarlierCVE-2023-53550Oct 4, 2025 · cpufreq: amd-pstate: fix global sysfs attribute type
    22Monitor
  • Later →CVE-2023-53552Oct 4, 2025 · drm/i915: mark requests for GuC virtual engines to avoid use-after-free
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3b24c980dc07be4550a9d1450ed7057f882530e5Vendor (CNA)
Linux Linux44e004f757a7ae13dfebaadbcfdb1a6f98c10377Vendor (CNA)
Linux Linux5ec63fdbca604568890c577753c6f66c5b3ef0b5Vendor (CNA)
Linux Linuxc5360eec648bd506afa304ae4a71f82e13d41897Vendor (CNA)
Linux Linuxec357cd3e8af614855d286dd378725cdc7264df6Vendor (CNA)
debian:linux6.1.15-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records